Could alien signals have already reached Earth undetected?

Could alien signals have already reached Earth undetected? - If advanced alien civilisations exist and have contacted Earth, ...

If alien signals have already reached Earth, why haven't we seen them?

For decades, scientists have searched the skies for signs of extraterrestrial technology. A study from EPFL asks a sharp ...
Knowridge Science Report

If aliens already called, why didn’t we hear?

For more than 60 years, scientists have been scanning the skies for signs of intelligent life beyond Earth. Using powerful telescopes, they have searched for unusual radio signals, brief laser flashes ...
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Why scientists think aliens probably do exist (but not like in the movies)

The odds are that life is out there – but rather than little green men, it may look more like hydrothermal vent tubeworms ...
The Debrief

The Search for Alien Tech Reveals a Pulsar at the Heart of the Galaxy—And It Could Help Test Einstein’s Theory of Gravity

Researchers looking for signs of extraterrestrial life instead stumbled upon a pulsar at the center of the Milky Way galaxy.
Forbes

Aliens 200 Light-Years Away Could Detect Our Airports, Scientists Say

Major airports may be alerting intelligent alien civilizations to our presence, according to new research. Are we being watched? Radar systems at major airports may be doing more than managing air ...